1389029240 has 96 divisors (see below), whose sum is σ = 3269803680. Its totient is φ = 531009024.

The previous prime is 1389029227. The next prime is 1389029249. The reversal of 1389029240 is 429209831.

It is a junction number, because it is equal to n+sod(n) for n = 1389029194 and 1389029203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389029249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5281349 + ... + 5281611.

It is an arithmetic number, because the mean of its divisors is an integer number (34060455).

Almost surely, 2^1389029240 is an apocalyptic number.

1389029240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389029240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634901840).

1389029240 is an abundant number, since it is smaller than the sum of its proper divisors (1880774440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389029240 is a wasteful number, since it uses less digits than its factorization.

1389029240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1389029240 is about 37269.6825851791. The cubic root of 1389029240 is about 1115.7591644678.

The spelling of 1389029240 in words is "one billion, three hundred eighty-nine million, twenty-nine thousand, two hundred forty".